Improvement in wood-boring machines



AM. PHOTO-LITHO. C0. MY. (DSBORNE'S PROCESS) UNITED STATES PATENT OFFICE.

DAVID HOIT, OF FORT WAYNE, INDIANA.

IMPROVEMENT IN WOOD-BORING MACHINES.

Specification forming partof Letters Patent No. 57,718, dated September 4, 1866.

To all whom it may concern:

Be it known that I, DAVID HOIT, of Fort Wayne, Indiana, have invented certain new and useful Improvements in Borin g-Machin es 5 and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the drawings which accompany this specification, and form a part thereof, and to the letters of reference marked thereon.

My invention consists in an arrangement of devices by which the auger in a boring-machine can traverse up and down and horizontally while in motion, together with an arrangement for gaging the depth of the cut, as may be desired, by means of a sliding collar.

1n the drawings, Plate `l is a top plan of the machine. Plate 2 is an end elevation of the same. Plate 3 is a front elevation of the same. Plate 4 is a transverse. section of the same..

In Plate 1,H H H H represent the framing, which is of ordinary construction. N is the auger. C is a shaft, carrying the auger. a is a pulley upon the shaft C, which is driven by a belt from any driving-shaft.

The pulley a, is provided with a hub, A, having a rib on its inner surface fitting into a groove in the shaft C, by means of which the shaft Gis moved backward or forward through the pulley a by the handle I of the rod D, which is attached to the collar d at the rear end of the shaft O. (See Plate 2.)

F, Plate 1, is a counter-shaft, driven by a belt passing over the pulley c, fitted upon the same, and carrying upon its forward end the pulleys f and f', which are fitted rigidly upon said shaft.

P is a short shaft attached to the lower part of the front end of the frame, parallel to the shafts C and F, and provided at either end with pulleys g and g. The pulley g is driven by a half cross belt from the pulley f on shaft F, and the pulley g is driven by a straight belt from the pulley j" upon the same shaft, these pulleys both running loose upon the shaft P, their inner ends made concave, and closely fitting the ends of the friction-clutch h h', which slides upon and turns with the shaft P.

The friction-clutch h h is actuated by the lever E, which has its fulcrum in the brace n. The shaft P has also rigidly attached to it a spur-wheel, s, which gears into a larger spurwheel, S, Plate 4, which is fast upon the forward end of the shaft L, which is furnished with bevel-pinions 3 and 4, Plate 2.

J J are upright screws, with shoulders resting upon bearings formed by the knees K K', and provided underneath said bearings with bevel-pinions l and 2, working into the corresponding bevel-pinions 2 and 3 on the shaft L.

The screws J J work in nuts m m', which form the ends of the yoke M. Attached to and forming a part of said nuts on m are loops or eyes, which receive and are secured to the guide-posts B and B', which carry the augershaft C and its connect-ions. The guide-posts 1 B and B work in ears above and below, which are attached to the framing. The yoke M serves as a frame for the support of the bearings of the shaft B, to which is attached the pulley c, Plate 2, which acts as an equalizingtightener in raising and lowering the augershaft and attach ments.

c, Plate 2, is a short shaft rigidly attached to the bearing of the shaft G at the top of the guide-post B', and working through an eye in the collar d', upon which is a collar-stop, e, held by a set-screw,and which serves to regulate the horizontal movement of the auger- Ashaft G. The shaft D is provided with a similar collar-stop, c', which serves to govern the opposite motion of the auger-shaft C.

The pulley c has its seat upon the shaft c,

over which runs the cord o, to which is at.

tached the weight o. The cord is fastened to the collar-stop e of the shaft c, and is intended to produce the return motion of the augershaft C when the hole is bored.

It will be seen that when the auger is in motion the lever E will maintain its vertical position, and the auger perpendicularly is at rest; but, by pressing the lever right or left, the auger is raised or lowered when and as much as may be desired. The distance between the collar-stop c and the collar d' will always indicate the depth of the hole to be bored, and can be measured accurately while the auger is in motion.

Having thus fully described my said improvement, what I claim as new,and desire to secure by Letters Patent, is-

l. The auger-shaft C, shafts c and D, and guide-posts B and Bf, arranged and operating as described.

2. The shaft L, screws J J l, nuts m fm', and yoke M, as and for the purposes set forth.

3. The arrangement and combination of the Y parts herein described forgiving the auger of aboring-maehine a perpendicular and horizontal motion independently or simultaneously, in the manner and for the purposes herein vset forth.

DAVID HOIT. Witnesses WM. F. DENNIS, A. W. CORNELL. 

